March 28AD 37 – Roman emperor Caligula accepts the titles of the Principate, bestowed on him by the Senate. 193 – After assassinating the Roman Emperor Pertinax, his Praetorian Guards auction off the throne to Didius Julianus. 364 – Roman Emperor Valentinian I appoints his brother Flavius Valens co-emperor. 1065 – The , which had been under attack by Bedouin bandits for three days, is rescued by the Fatimid governor of Ramla. 1566 – The foundation stone of Valletta, Malta's capital city, is laid by Jean Parisot de Valette, Grand Master of the Sovereign Military Order of Malta.
July 2437 – Emperor Valentinian III begins his reign over the Western Roman Empire. His mother Galla Placidia ends her regency, but continues to exercise political influence at the court in Rome. 626 – Li Shimin, the future Emperor Taizong of Tang, ambushes and kills his rival brothers Li Yuanji and Li Jiancheng in the Xuanwu Gate Incident. 706 – In China, Emperor Zhongzong of Tang inters the bodies of relatives in the Qianling Mausoleum, located on Mount Liang outside Chang'an.
March 191277 – The Byzantine–Venetian treaty of 1277 is concluded, stipulating a two-year truce and renewing Venetian commercial privileges in the Byzantine Empire. 1279 – A Mongol victory at the Battle of Yamen ends the Song dynasty in China. 1284 – The Statute of Rhuddlan incorporates the Principality of Wales into England. 1452 – Frederick III of Habsburg is the last Holy Roman Emperor crowned by medieval tradition in Rome by Pope Nicholas V. 1563 – The Edict of Amboise is signed, ending the first phase of the French Wars of Religion and granting certain freedoms to the Huguenots.
November 1365 – The Alemanni cross the Rhine and invade Gaul. Emperor Valentinian I moves to Paris to command the army and defend the Gallic cities. 996 – Emperor Otto III issues a deed to Gottschalk, Bishop of Freising, which is the oldest known document using the name Ostarrîchi (Austria in Old High German). 1009 – Berber forces led by Sulayman ibn al-Hakam defeat the Umayyad caliph Muhammad II of Córdoba in the battle of Alcolea. 1141 – Empress Matilda's reign as 'Lady of the English' ends with Stephen of Blois regaining the title of 'King of England'.
February 14748 – Abbasid Revolution: The Hashimi rebels under Abu Muslim Khorasani take Merv, capital of the Umayyad province Khorasan, marking the consolidation of the Abbasid revolt. 842 – Charles the Bald and Louis the German swear the Oaths of Strasbourg in the French and German languages. 1014 – Pope Benedict VIII crowns Henry of Bavaria, King of Germany and of Italy, as Holy Roman Emperor. 1130 – The troubled 1130 papal election exposes a rift within the College of Cardinals.
July 10138 – Emperor Hadrian of Rome dies of heart failure at his residence on the bay of Naples, Baiae; he is buried at Rome in the Tomb of Hadrian beside his late wife, Vibia Sabina. 645 – Isshi Incident: Prince Naka-no-Ōe and Fujiwara no Kamatari assassinate Soga no Iruka during a coup d'état at the imperial palace. 988 – The Norse King Glúniairn recognises Máel Sechnaill mac Domnaill, High King of Ireland, and agrees to pay taxes and accept Brehon Law; the event is considered to be the founding of the city of Dublin.
April 30311 – The Diocletianic Persecution of Christians in the Roman Empire ends. 1315 – Enguerrand de Marigny is hanged at the instigation of Charles, Count of Valois. 1492 – Spain gives Christopher Columbus his commission of exploration. He is named admiral of the ocean sea, viceroy and governor of any territory he discovers. 1513 – Edmund de la Pole, Yorkist pretender to the English throne, is executed on the orders of Henry VIII. 1557 – Mapuche leader Lautaro is killed by Spanish forces at the Battle of Mataquito in Chile.
March 21537 – Siege of Rome: King Vitiges attempts to assault the northern and eastern city walls, but is repulsed at the Praenestine Gate, known as the Vivarium, by the defenders under the Byzantine generals Bessas and Peranius. 630 – Emperor Heraclius returns the True Cross, one of the holiest Christian relics, to Jerusalem. 717 – Battle of Vincy between Charles Martel and Ragenfrid. 1152 – Annulment of the marriage of King Louis VII of France and Queen Eleanor of Aquitaine. 1180 – Emperor Antoku accedes to the throne of Japan.
MarchMarch is the third month of the year in both the Julian and Gregorian calendars. It is the second of seven months to have a length of 31 days. In the Northern Hemisphere, the meteorological beginning of spring occurs on the first day of March. The March equinox on the 20 or 21 marks the astronomical beginning of spring in the Northern Hemisphere and the beginning of autumn in the Southern Hemisphere, where September is the seasonal equivalent of the Northern Hemisphere's March.
April 4503 BC – Roman consul Agrippa Menenius Lanatus celebrates a triumph for a military victory over the Sabines. 190 – Dong Zhuo has his troops evacuate the capital Luoyang and burn it to the ground. 611 – Maya king Uneh Chan of Calakmul sacks rival city-state Palenque in southern Mexico. 801 – King Louis the Pious captures Barcelona from the Moors after a siege of several months. 1268 – A five-year Byzantine–Venetian peace treaty is concluded between Venetian envoys and Emperor Michael VIII Palaiologos.
